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1,5-Dihydroxy naphthalene

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Products Intro: Product Name:1,5-Dihydroxy naphthalene
CAS:83-56-7
Purity:98%(Min,GC) Package:100g;1kg;5kg,10kg,25kg,50kg
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CAS:83-56-7
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CAS:83-56-7
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Products Intro: CAS:83-56-7
Purity:99% Package:5KG;1KG;25KG

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1,5-Dihydroxy naphthalene Basic information
Product Name:1,5-Dihydroxy naphthalene
Synonyms:Naphthalene-1,5-diol;1,8-NAPHTHALENEDIMETHANOL;1,5-DIHYDROXYNAPHTHALENE;1,5-NAPHTHALENEDIOL;1,5-Dihydroxynaphthalene 97%;1,5-Dihydroxy phthalene;C.I. 76625;c.i.76625
CAS:83-56-7
MF:C10H8O2
MW:160.17
EINECS:201-487-4
Product Categories:-;Indazoles;Intermediates of Dyes and Pigments;Naphthalene derivatives
Mol File:83-56-7.mol
1,5-Dihydroxy naphthalene Structure
1,5-Dihydroxy naphthalene Chemical Properties
Melting point 259-261 °C (dec.)(lit.)
Boiling point 246.06°C (rough estimate)
density 1.0924 (rough estimate)
refractive index 1.5418 (estimate)
Fp 252°C
storage temp. 2-8°C
solubility 0.6g/l
PH6 (0.5g/l, H2O, 20℃)
Water Solubility Soluble in water.
BRN 2044951
CAS DataBase Reference83-56-7(CAS DataBase Reference)
NIST Chemistry Reference1,5-Naphthalenediol(83-56-7)
EPA Substance Registry System1,5-Naphthalenediol(83-56-7)
Safety Information
Hazard Codes Xn,N,Xi
Risk Statements 22-51/53-36-36/37/38
Safety Statements 22-24/25-61-39-29-26
WGK Germany 2
RTECS QJ4740000
8-21
TSCA Yes
HS Code 29072900
MSDS Information
ProviderLanguage
1,5-Dihydroxy naphthalene English
SigmaAldrich English
ALFA English
1,5-Dihydroxy naphthalene Usage And Synthesis
Chemical PropertiesGrey powder
Purification MethodsThe diol (~30g) is purified by making into a thick paste with H2O and suspending this in 3L of H2O containing 200mL of EtOH, boiling under reflux for 3hours, cooling to 30o, saturating with SO2, digesting below the boiling point for 1hour and filtering fast through a large hot filter paper. The hot filtrate is poured onto crushed ice whereby the diol (15-20g) separates as colourless needles (m 258o) [Wheeler & Ergle J Am Chem Soc 52 4873 1930]. Recrystallise it from H2O or nitromethane under N2 to avoid oxidation. The dibenzoyl derivative has m 245o (from EtOH). The 5-methoxy-1-naphthol derivative [prepared from the diol in MeOH/HCl (1:30 weight to volume ratio) and set aside at 25o for 9-10days] crystallised from pet ether (m 135-136o) or from CH2Cl2/hexane (needles m 140o) [Bell & McCaffrey Aust J Chem 46 731 1993]. [Beilstein 6 I 477, 6 II 950, 6 III 5265, 6 IV 6554.]
1,5-Dihydroxy naphthalene Preparation Products And Raw materials
Preparation ProductsPLUMBAGIN-->Mordant Black 9
Raw materialsSulfuric acid -->SULFURIC ACID-->Naphthalene-->1,5-Naphthalenedisulfonic acid
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